fack aff - A lie you tell yourself so you can keep being a pain in the

A lie you tell yourself so you can keep being a pain in the neck.

'Fack aff, I don't need your help!' he said, even though he failed the test.

She said, 'Fack aff, I'm not crying!' while sobbing into a pillow.

He told his friend, 'Fack aff, I'm not going to the concert!' and then bought a ticket.